books.google.com - For more than two thousand years a familiarity with mathematics has been regarded as an indispensable part of the intellectual equipment of every cultured person. Today, unfortunately, the traditional place of mathematics in education is in grave danger. The teaching and learning of mathematics has degenerated...http://books.google.com/books/about/What_Is_Mathematics_An_Elementary_Approa.html?id=UfdossHPlkgC&q=projective+geometry&utm_source=gb-gplus-shareWhat Is Mathematics?: An Elementary Approach to Ideas and Methods

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## What Is Mathematics?: An Elementary Approach to Ideas and MethodsBy Richard Courant, Herbert Robbins |